Gas burner secondary air-feed ring and baffle



June 16, 1953 H. D. DU FAULT GAS BURNER SECONDARY AIR-FEED RINGS AND BAFFLE Filed May 23, 1951 INVENTOR.

Patented is... 16, 1953 GAS BURNER SECONDARY AIR-FEED RING AND BAFFLE 7 Homer D. Du Fault, Easthampton, Mass, assignor to Heatbath Appliances, Inc., Indian Orchard, Springfield, Mass., a corporation of Massachusetts 7 Application May 23, 1951, Serial No. 227,826

7 1 This invention relates to improvements in gas burner apparatus. V

The principal objects of the invention are directed to the provision of gas burner apparatus which is adapted for conversion purposes where the apparatus is installed in an existing boiler or hot air' furnace or the like or for use in new installations. H

The novel features of the invention provide apparatus which is readily and easily installed and the components'thereof are readily and easily replaced without the necessity of general dismantling. I According to special features of the invention,

secondary air is directed in parallelism with the as discharged from the gas port to bring about proper mixing and efficient combustion.

'All of the above objects I accomplish by means of such structure and relative arrangements of parts thereof, as willfully appear by a perusal of the description below and by various specific features which will be hereinafter set forth. 1 To the above cited and other ends and with the foregoing and various othernovel features and advantages and other objects of my invention as 1 Claim. (Cl. 158113) will become more readily apparentas the de-' scription proceeds, myinvention consists in certain novel features of construction and in the combination and arrangement of parts as will.

be hereinafter more particularly pointed out in the claims hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein:

Fig. 1 is a vertical sectional elevational view through the lower part of a heater having the apparatus of the invention associated therewith;

Fig. 2 is a side elevational, view of the upper.

tends a gas supply pipe l2 connected to the lower end of a stand pipe l4.

Gas is supplied the housing and will enclose the usual controls and means for supplying pri- 'mary air'when necessary. It will be understood that the products of combustion are ignited by a pilot and the burner operated through the control r 2 I mechanism. For purposes of disclosure, it will be assumed that a mixture of gas and air will flow upwardly in the stand pipe according to operation of the control apparatus.

Means for adjustably supporting the stand pipe 14 may include bolts I8 in threaded engagement with ears 29 on opposite sides of the said stand pipe. The supporting means will be such that together with the pipe I2 the stand pipe will be maintained in vertical substantially rigid position. s a

The standpipe M has an open upper end 22 through which the primary gas mixture is discharged and is provided with an annular shoulder 24 therearoundJ A port member 30' is provided which has a central gas port 34 and an annular air port 36 therearound, as shownin Figs. 3 and 4. The upper end of the stand pipe I4 is removably receivable in the gas port 34 of the port member whereby the member 30 may be supported on the shoulder 24 of said stand pipe.

s A S10t38 is provided in one side of the port member in whicha pilot device of well known form may be disposed. Ahub 40 centrally of the member 38 is provided with a socket opening 42. v

A spacer 44 has a post 46 provided on its lower end with a stem 48 which is receivable in the socket opening 42 of the member 35.

A flange 41 on the upper end of the post is provided with upstanding studs 50 as shown.

A baflie 52 is provided which has holes 54 therethrough in which the studs 55 are receivable. The bafiie will preferably be formed from refractory material or the like.

The parts are readily assembled by placing the port member 30 on the upper end of the stand pipe [4. The stem 48 of the spacer 44 is inserted in the opening 42 of the port member and the baflie 52 is superposed on the flange 41 of the spacer.

. 'A lower wall56 may be supported around its outer edges as by bra'ckets 58 or the like carried by the walls 2 and there may be refractory material 60 on said wall 56. The inner portion of the wall 56 will be supported on an annular flange 3| of the port member 30. The lower wall construction will be formed in section or in some manner arranged to allow the post member to be inserted on and removed from the stand pipe.

In operation, primary gas mixture will flow from the gas port 34 in the direction of arrows a and secondary air will flow upwardly in substantial parallelism therewith in direction of arrows b and towards the bafile 52 which deflects the gas mixture and secondary air radially and outwardly towards the walls of the furnace or boiler and upwardly.

Thus there is efficient mixing of secondary air and products of combustion for heating of the furnace or boiler.

The flow of secondary air through port 36 around the gas mixture brings about the desired complete association of primary mixture and secondary air to support combustion so that the flame is directed most effectively outwardly by the bafiie.

Should the baffle 52 or support require replacing, they are readily removed through the fire door of the furnace or boiler.

The member 30 having a gas opening and an air opening functions as a combined fuel and air port, discharge or outlet whereby fuel and I secondary air are intermixed for combustion and being located on the member I4 is readily re- 'placeable.

In the event the port member 4.4 around the gas port becomes burned or unfit for service the said member may be removed and replaced. Thus the upper end of the stand pipe is protected and obviates the necessity of complete discific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

Gas burner apparatus adapted to be supported on the annular shoulder spaced downwardly from the open upper end of a vertically disposed stand pipe comprising, a port member having radially spaced and concentrically arranged inner and intermediate and outer annular co-axial portions connected by radially extending and circumferentially spaced members providing an inner socket and separate intermediate and outer vertically extending concentrically arranged annular gas and air ports, said intermediate annular portion being arranged to receive the upper end of the stand pipe in the gas port thereof and to rest on the annular shoulder for supporting said port member, the upper side of the said intermediate annular portion being disposed in a plane disposed vertically above the plane of the upper side of the outer annular portion whereby the air port is in a plane below that of the gas port, an elongated spacer having a lower end receivable in the socket of said port member and a shoulder therearound for resting on the inner annular member whereby said spacer is supported in vertically extending position, a flange provided on the upper end of said spacer having an upper horizontally disposed supporting face provided with vertically extending relatively spaced studs, and a separate circular baffle formed from refractory material on the supporting surface of said flange provided with openings formed to loosely receive the studs.

HOMER D. DU FAULT.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,475,240 Hassmer et al. July 5, 1949 2,549,347 Van Tuyl Apr. 17, 1951 

